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				@@ -75,7 +75,7 @@ pipeline { 
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				               container_ip_server=`docker inspect ${container_id_server} --format='{{.NetworkSettings.IPAddress}}'` 
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				               container_id_client=`docker run -d --rm -e "mode=client" -e "server=${container_ip_server}" --privileged ${DOCKER_REGISTRY}/iru/${DOCKER_IMAGE}:${SERIAL}` 
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				               sleep 15 
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				-              docker exec ${container_id_client} ping -c 3 -q 10.10.20.1 
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				+              docker exec \${container_id_client} ping -c 3 -q 10.10.20.1 
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				               if [ $? != 0 ] 
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				               then 
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				                 echo "Can not connect to VPN server !!!" 
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